Optimal Timing for Intrauterine Device Insertion During the Menstrual Cycle: A Comparative Study of Pain, Bleeding, and Postprocedural Outcomes

Background: Intrauterine device (IUD) insertion is a highly effective contraceptive procedure but is frequently associated with pain and bleeding, which may negatively influence patient acceptance and continuation rates. Although traditionally performed during menstruation, the optimal timing of insertion within the menstrual cycle remains uncertain, with limited data regarding patient-centered outcomes. Objective: The aim of this study was to evaluate the impact of menstrual cycle timing on pain, intra-procedural bleeding, and postprocedural outcomes in women undergoing IUD insertion. Methods: A comparative observational study was conducted including 200 parous women aged 20–40 years. Participants were consecutively enrolled and classified into two groups according to the day of the menstrual cycle at presentation for IUD insertion: Group A (days 3–7 of the menstrual cycle) and Group B (days 10–14). All procedures were performed by the same experienced gynecologist using a standardized technique. Pain was assessed using a Visual Analog Scale (VAS), intra-procedural bleeding was graded on a 0–3 scale, and postprocedural outcomes included analgesic use and bleeding characteristics. Statistical analysis was performed using independent t-tests and chi-square tests. Results: Baseline characteristics were comparable between groups (p > 0.05). Mean pain scores were significantly lower in Group B compared to Group A (3.1 ± 1.2 vs. 5.8 ± 1.4, p < 0.001). Intra-procedural bleeding was also significantly reduced in the mid-cycle group, with higher rates of minimal or no bleeding (85% vs. 20%, p < 0.001). The need for postprocedural anti-inflammatory medication was significantly lower in Group B (22% vs. 76%, p < 0.001). Additionally, postprocedural bleeding duration and intensity were reduced in the mid-cycle group. Conclusions: IUD insertion performed during the mid-cycle phase was associated with significantly better tolerability, including reduced pain, less bleeding, and decreased need for analgesia. While current guidelines allow flexible timing, these findings suggest that mid-cycle insertion may be associated with improved patient comfort when clinically feasible to improve patient experience without compromising access to contraception. Further randomized studies are warranted to confirm these results.